Results 201 to 210 of about 146,915 (245)

Multienergy Anomalous Diffuse Scattering

Physical Review Letters, 2008
A new approach to local structure determination is presented. A three-dimensional region of the reciprocal space of a SrTiO(3) single crystal was mapped by measuring x-ray diffuse scattering patterns at different sample orientations in order to reconstruct the local atomic structure.
M, Kopecký, J, Fábry, J, Kub, A, Lausi, E, Busetto   +4 more
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Anomalous diffusion in ferrofluids

Physical Review E, 2009
By dynamic light scattering we have studied suspensions of ferrimagnetic maghemite (gamma-Fe2O3) nanoparticles in n -decane with attractive interparticle interaction. The measurements in the suspensions of different concentrations ranging from 0.21 to 25.8 wt % have been compared in zero external field and in the magnetic field of 270 mT.
Alenka, Mertelj, Luka, Cmok, Martin, Copic   +2 more
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Thermodynamics of Anomalous Diffusion

Physical Review Letters, 1995
It is pointed out that the generalized statistical mechanics introduced by Tsallis [J. Stat. Phys. 52, 479 (1988)] provides a natural frame for developing a thermodynamical formalism of anomalous diffusion. Within such a frame, we calculate the mean square displacement as a function of time and generalize the Einstein relation of diffusivity and ...
, Zanette, , Alemany
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Fractals without anomalous diffusion

Physical Review E, 1994
By an alternative analytical technique we solve the random-walk problem on a particular class of fractal trees, calculating the exact value of their spectral dimension. The result shows that for all these structures the spectral dimension and the fractal dimension are equal, providing an example of fractal structures with nonanomalous diffusion as well
BURIONI, Raffaella, CASSI, Davide
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Anomalous collective diffusion

Physical Review Letters, 1994
A new region characterized by Levy diffusion exists in collective motion between the adiabaic and diabatic limits. Repeated chaotic scattering off of level crossings, whose repulsive or attractive nature changes dynamically, can result in localization of the collective motion for arbitrarily periods of time, and anomalous diffusion.
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Generalized diffusion equation for anisotropic anomalous diffusion

Physical Review E, 2006
Motivated by studies of comblike structures, we present a generalization of the classical diffusion equation to model anisotropic, anomalous diffusion. We assume that the diffusive flux is given by a diffusion tensor acting on the gradient of the probability density, where each component of the diffusion tensor can have its own scaling law.
Sellers, S., Barker, J.A.
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Anomalous phosphorous diffusion

IEEE Transactions on Electron Devices, 2002
It has been found that P diffuses anomalously at low temperatures in heavily doped regions with doping concentration greater than 7/spl times/10/sup 20/ cm/sup -3/. Furthermore, it was found that the anomalous diffusion continues for a certain time period which cannot be suppressed by high-temperature annealing.
K. Suzuki, H. Tashiro, Y. Tada, Y. Kataoka   +3 more
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Anomalous two-state model for anomalous diffusion

Physical Review E, 2001
An anomalous two-state model (ATSM) with the anomalous long-tailed kinetics of transitions between states is proposed to describe the specific features of anomalous diffusion (AD) and AD-assisted transitions (ADAT) in the double-well potential. In the ATSM the system is assumed to undergo the conventional diffusion in both states but with different ...
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Anomalous Diffusion at Liquid Surfaces

Physical Review Letters, 1995
We study the role of bulk-surface exchange in the diffusion of adsorbed molecules at liquid-solid and liquid-fluid interfaces. For ``strong adsorbers'' (readsorption time much less than desorption time) we find anomalous surface diffusion on time scales less than the surface retention time: Displacement moments grow as $〈{r}^{q}〉\ensuremath{\sim}{t ...
, Bychuk, , O'Shaughnessy
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Spectral design of anomalous diffusion

Physica A: Statistical Mechanics and its Applications, 2023
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